Refactor code structure for improved readability and maintainability

Models/DeploymentRuleModel.cs

@@ -0,0 +1,18 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Microsoft.SelfService.Portal.Core.API.Models
+{
+    public class DeploymentRuleModel : BaseModel
+    {
+        [Column(Order = 1)]
+        public string Name { get; set; }
+
+        [Column(Order = 2)]
+        public string? Description { get; set; }
+
+        [Column(Order = 3)]
+        public bool IsActive { get; set; } = true;
+
+        public ICollection<DeploymentRuleStepModel> Steps { get; set; } = new List<DeploymentRuleStepModel>();
+    }
+}